Genesis 1:2
“ וְהָאָרֶץ, הָיְתָה תֹהוּ וָבֹהוּ, וְחֹשֶׁךְ, עַל-פְּנֵי תְהוֹם; וְרוּחַ אֱלֹהִים, מְרַחֶפֶת עַל-פְּנֵי הַמָּיִם.”
“The earth was formless (תוהו Tohu) and void (בהו Vohu), and darkness was over the surface of the deep, and the Spirit of God was moving over the surface of the waters.”

The ‘formless’ was a raw state of darkness immediately after the first Tzimtzum.Nothing was created at this stage.

Imagine a state of atom but without any field of energy or moving particles. There’s no light but at the same time any desired light could come into the space.
The second tzimtzum came with a great noise because there was the vibrations of the braking of the vessels. This is the state of constructing the atom with its nucleus and electrons in orbit, creating the magnetic ‘south’ and darkness was the ‘north’ to create the needed movements/vibrations to form the world,
This vibration is the aspect of “and God said….”